import java.io.*;
public class EchoPlayer{
	public String echo(String msg){
		return "echo:"+ msg;
	}
	public void talk() throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String msg=null;
		while((msg=br.readLine())!=null){
			System.out.println(echo(msg));
			if("bye".equals(msg)) break;
		}
	}
	public static void main(String[] args) {
		try
		{
			new EchoPlayer().talk();
		}catch(IOException e)
		{
			System.out.println(e);
		}
	}
}